Vibrating-lever-operating mechanism.



No 848,263. PATBNTED MAR. 26, 1907.

' L. ONDERDONK.

VIBRATING LEVER OPERATING MECHANISM. APPLICATION FILED JULY 8. 1904.

. iiii lflillllliii O 1.. RIM R 1 No. 848,263; YPATENTED MAR. 26, 1907.

L. ONDERDONK.

VIBRATING LEVER OPERATING MEGHANISM. APPLIOATION FILED JULY 8.1904.

2 SHEETS-SHEET 2.

witvwooao nwutoz LW UNITED STATES PATENT oEEIoE.

LANSING ONDERDONK, OF NEW YORK, N. Y., ASSIGNOR TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLI- NOIS.

VlBRATlNG-LEVER-OPERATING MECHANISM.

Specification of Letters Patent.

Patented March 26, 1907.

Application filed July 8. 1904. Serial No- 215,791.

To all whom it may concern.-

Be it known that I, LANSING ONDERDONK, a citizen of the United States, residing at New York, in the county of New York, State of New York, have invented certain new and useful Improvements in V ibrating-Lever- Op crating Mechanism, of which the following is a description, reference being had to the accompanying drawing and to the letters and figures of reference marked thereon.

My invention relates to an improvement in mechanism for operating a vibrating lever, and relates particularly to the operation of a lever which is fulcrumed intermediate its ends and is driven by two oppositely-disposed eccentrics arranged upon a driving-shaft and connected with the lever upon opposite sides of the fulcrum-point.

The object for which I have primarily designed the invention is for driving the needlelever of a sewing-machine but I do not wish to be limited thereto. I

The particular feature in which the present invention consists relates to the matter of fulcruming the needle-lever upon a stud which is supported on a pivotal bearing, so that if the eccentrics are not exactly oppositely placed or are not exactly true the fulcrum-point will bodily shift, so that the movements will be applied to the lever at exactly the right periods of time.

.The invention consists in the matters hereinafter described, and referred to in the appended claims.

The invention is illustrated in the accompanying drawings, in which Figure 1 represents a front elevation with the cloth-plate removed of a Union Special overseaming-machine to which the invention is ap lied. Fig. 2 is a top plan view of the nee e-lever-operating means and the support for said needle-lever, partly in section.

In these drawings, A represents the frame of the sewing-machine, B the driving-shaft, and C the needle-lever. This needle-lever is pivoted on a stud D in the usual manner; but the stud instead of being attached to the gooseneck of a sewing-machine in the ordinary way is secured by means of a bolt E upon the arm F, which has the ordinary conebearings (indicated ,by the letter G) in the gooseneck of the machine. Upon opposite sides of the fulcrum-point of the needle-lever C is attached the upper end of the connecting-rods H I, which at their lower ends embrace and are driven by the eccentrics K L on the main shaft. It will be seen that if the eccentrics K and L are exactly oppositely disposed upon the shafts and are in all respects true that in the rotation of the driving-shaft the needle-lever will simply oscillate upon the stud D in the usual way; but if the eccentrics are not true or are not exactly oppositely disposed then the arm F will swing under the influence of the eccentrics, thus compensating for any lack of per fection in the formation or arrangement of said eccentrics.

While, as above stated, I have shown this invention as applied to the needle-lever of a sewing-machine, it will be understood that I do not wish to be limited thereto.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The herein-described mechanism for imparting vibrating movement to a lever, comprising a driving-shaft having arranged thereon two oppositely-disposed eccentrics, a lever pivoted upon a suitable support, which support is itself pivoted to a stationary part of the apparatus, and connections between the two eccentrics and the lever upon opposite sides of the fulcrum-point whereby a compensating fulcrum-bearing for the lever is afforded; substantially as described.

2. In combination with the lever, the stud on which the same is pivoted, a swinging arm supporting the stud, said arm being pivoted to a stationary part of the machine and power connections for oscillating said lever, applied upon opposite sides of its pivot; substantially as described.

3. In a sewing-machine, the combination with the rotating shaft thereof, two oppo sitely-disposed eccentrics thereon, a needlelever, a stud upon which the same is pivoted, an arm to which the stud is secured, said arm .being pivotally secured to the gooseneck of the sewing-machine, and connections between the eccentrics and the needle-lever upon opposite sides of its pivot; substantially as described. I

In testimony whereof I aflix my signature in presence of two witnesses.

. LANSING ONDERDONK. I/Vitnesses:

W. D- SWIFT, F. H. EMBLER. 

